Dogs sometimes fake being sick to get attention.
26
Only 3% of bird species have penises.
0
Some lizards, in which the tail is a major storage organ for accumulating reserves, will return to a dropped tail after the threat has passed, and will eat it to recover part of the sacrificed supplies.
13
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
All pandas are ‘owned’ by China. They rent them out to zoos for $1mil/year each with minimum of 10 years.
16
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
There are approximately three chickens for every human on Earth.
13